Г306
ПЕТЬ (ГОВОРИТЬ) С ЧУЖОГО (ТВОЕГО и т. п.) ГОЛОСА
coll,
disapprovVPsubj:
human being influenced by another person (or other people) and not having one's own opinion, to repeat the thoughts, opinions of that person (or those people)
X поёт с чужого голоса » X is parroting someone else's words (ideas, views )
X takes his opinions from others(in limited contexts) X has no mind of his own.